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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

Published on: August 1, 2017

Current drive at plasma densities required for thermonuclear reactors.

R Cesario¹, L Amicucci, A Cardinali

¹Associazione EURATOM/ENEA sulla Fusione, Centro Ricerche Frascati, Frascati 00044, Italy. cesario@frascati.enea.it

Nature Communications

|October 27, 2010

Summary

This summary is machine-generated.

Lower hybrid current drive in fusion energy research is enhanced by higher plasma temperatures. This allows radio frequency power to penetrate high-density plasmas, crucial for future fusion reactors.

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Area of Science:

Thermonuclear fusion energy research
Plasma physics
Radio frequency heating and current drive

Background:

Tokamak devices require efficient plasma current drive methods for fusion energy.
Lower hybrid waves can drive plasma current, but penetration is limited at high densities.
Plasma edge interactions hinder radio frequency power coupling in dense plasmas.

Purpose of the Study:

To investigate methods for improving radio frequency power penetration in high-density tokamak plasmas.
To demonstrate enhanced lower hybrid current drive effectiveness relevant for fusion power plants.

Main Methods:

Experiments conducted on the Frascati Tokamak Upgrade (FTU).
Utilized theoretical predictions on nonlinear wave-plasma interactions.
Focused on manipulating peripheral plasma electron temperature.

Main Results:

Demonstrated that high peripheral electron temperatures reduce nonlinear interactions.
Achieved significant radio frequency power penetration into high-density plasmas.
Observed weaker plasma edge effects facilitating wave propagation.

Conclusions:

High peripheral electron temperature enables effective lower hybrid current drive in dense plasmas.
Overcoming plasma edge effects extends the applicability of lower hybrid current drive for fusion reactors.